Holly Holm answered the call in a big way when she knocked out Ronda Rousey in Saturday’s UFC 193 pay-per-view headliner to take the women’s bantamweight championship.

A perfectly timed, perfectly placed head kick gave Holm (10-0 MMA, 3-0 UFC) one of the greatest upsets in UFC history when she stopped Rousey (12-1 MMA, 6-1 UFC) in the second round.

Rousey’s popularity was at its peak prior to UFC 193, which means more than just MMA fans tuned in for one of the most shocking results in MMA history. Check below to see what celebrities and fellow athletes thought of Holm’s upset of “Rowdy” at UFC 193.